87780653958 has 32 divisors (see below), whose sum is σ = 181863180000. Its totient is φ = 28212662016.

The previous prime is 87780653921. The next prime is 87780653993. The reversal of 87780653958 is 85935608778.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216583 + ... + 471666.

It is an arithmetic number, because the mean of its divisors is an integer number (5683224375).

Almost surely, 2^87780653958 is an apocalyptic number.

87780653958 is an abundant number, since it is smaller than the sum of its proper divisors (94082526042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87780653958 is a wasteful number, since it uses less digits than its factorization.

87780653958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689016.

The product of its (nonzero) digits is 101606400, while the sum is 66.

The spelling of 87780653958 in words is "eighty-seven billion, seven hundred eighty million, six hundred fifty-three thousand, nine hundred fifty-eight".