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32161393990 = 2511756138669
BaseRepresentation
bin11101111100111101…
…111110110101000110
310002000101100002112101
4131330331332311012
51011331304101430
622435202142314
72215663224025
oct357475766506
9102011302471
1032161393990
11127042a5360
12629695199a
1330570ca55b
1417b15168bc
15c8376bdca
hex77cf7ed46

32161393990 has 32 divisors (see below), whose sum is σ = 63163268640. Its totient is φ = 11693203200.

The previous prime is 32161393969. The next prime is 32161393997. The reversal of 32161393990 is 9939316123.

It is a self number, because there is not a number n which added to its sum of digits gives 32161393990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32161393997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812376 + ... + 851044.

It is an arithmetic number, because the mean of its divisors is an integer number (1973852145).

Almost surely, 232161393990 is an apocalyptic number.

32161393990 is a deficient number, since it is larger than the sum of its proper divisors (31001874650).

32161393990 is a wasteful number, since it uses less digits than its factorization.

32161393990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46248.

The product of its (nonzero) digits is 236196, while the sum is 46.

The spelling of 32161393990 in words is "thirty-two billion, one hundred sixty-one million, three hundred ninety-three thousand, nine hundred ninety".

Divisors: 1 2 5 10 11 22 55 110 7561 15122 37805 38669 75610 77338 83171 166342 193345 386690 415855 425359 831710 850718 2126795 4253590 292376309 584752618 1461881545 2923763090 3216139399 6432278798 16080696995 32161393990