1642700061 has 32 divisors (see below), whose sum is σ = 2520376320. Its totient is φ = 1056715632.

The previous prime is 1642699999. The next prime is 1642700131. The reversal of 1642700061 is 1600072461.

It is not a de Polignac number, because 1642700061 - 2¹⁴ = 1642683677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1642699998 and 1642700034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642701061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87840 + ... + 104886.

It is an arithmetic number, because the mean of its divisors is an integer number (78761760).

Almost surely, 2^1642700061 is an apocalyptic number.

It is an amenable number.

1642700061 is a deficient number, since it is larger than the sum of its proper divisors (877676259).

1642700061 is a wasteful number, since it uses less digits than its factorization.

1642700061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17182 (or 17176 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1642700061 is about 40530.2363797696. The cubic root of 1642700061 is about 1179.9205301742.

The spelling of 1642700061 in words is "one billion, six hundred forty-two million, seven hundred thousand, sixty-one".