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16642665052 = 22132157191821
BaseRepresentation
bin11110111111111101…
…01110101001011100
31120221212002222111221
433133332232221130
5233041010240202
611351234023124
71126264214236
oct173776565134
946855088457
1016642665052
117070394642
123285717aa4
131752c6c700
14b3c463256
15676140037
hex3dffaea5c

16642665052 has 72 divisors (see below), whose sum is σ = 31943261952. Its totient is φ = 7583097600.

The previous prime is 16642665047. The next prime is 16642665073. The reversal of 16642665052 is 25056624661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20270802 + ... + 20271622.

It is an arithmetic number, because the mean of its divisors is an integer number (443656416).

Almost surely, 216642665052 is an apocalyptic number.

It is an amenable number.

16642665052 is a deficient number, since it is larger than the sum of its proper divisors (15300596900).

16642665052 is a wasteful number, since it uses less digits than its factorization.

16642665052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 16642665052 in words is "sixteen billion, six hundred forty-two million, six hundred sixty-five thousand, fifty-two".

Divisors: 1 2 4 13 26 52 157 169 191 314 338 382 628 676 764 821 1642 2041 2483 3284 4082 4966 8164 9932 10673 21346 26533 29987 32279 42692 53066 59974 64558 106132 119948 128897 129116 138749 156811 257794 277498 313622 389831 515588 554996 627244 779662 1559324 1675661 2038543 3351322 4077086 5067803 6702644 8154172 10135606 20271212 21783593 24619327 26501059 43567186 49238654 53002118 87134372 98477308 106004236 320051251 640102502 1280205004 4160666263 8321332526 16642665052