77002020139 has 32 divisors (see below), whose sum is σ = 86785820352. Its totient is φ = 67728960000.

The previous prime is 77002020101. The next prime is 77002020143. The reversal of 77002020139 is 93102020077.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77002020139 is a prime.

It is a super-2 number, since 2×77002020139² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77002020139.

It is not an unprimeable number, because it can be changed into a prime (77002020539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10636429 + ... + 10643665.

It is an arithmetic number, because the mean of its divisors is an integer number (2712056886).

Almost surely, 2^77002020139 is an apocalyptic number.

77002020139 is a deficient number, since it is larger than the sum of its proper divisors (9783800213).

77002020139 is a wasteful number, since it uses less digits than its factorization.

77002020139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7567.

The product of its (nonzero) digits is 5292, while the sum is 31.

The spelling of 77002020139 in words is "seventy-seven billion, two million, twenty thousand, one hundred thirty-nine".