78037641021 has 8 divisors (see below), whose sum is σ = 106862355424. Its totient is φ = 50619010320.

The previous prime is 78037640971. The next prime is 78037641061. The reversal of 78037641021 is 12014673087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78037641021 - 2⁶ = 78037640957 is a prime.

It is a super-2 number, since 2×78037641021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78037641061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351520795 + ... + 351521016.

It is an arithmetic number, because the mean of its divisors is an integer number (13357794428).

Almost surely, 2^78037641021 is an apocalyptic number.

It is an amenable number.

78037641021 is a deficient number, since it is larger than the sum of its proper divisors (28824714403).

78037641021 is a wasteful number, since it uses less digits than its factorization.

78037641021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703041851.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 78037641021 in words is "seventy-eight billion, thirty-seven million, six hundred forty-one thousand, twenty-one".