158715777402 has 640 divisors, whose sum is σ = 479480601600. Its totient is φ = 38894929920.

The previous prime is 158715777401. The next prime is 158715777403. The reversal of 158715777402 is 204777517851.

158715777402 is a `hidden beast` number, since 1 + 5 + 87 + 157 + 7 + 7 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (158715777401) and next prime (158715777403).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (158715777401) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 681183478 + ... + 681183710.

It is an arithmetic number, because the mean of its divisors is an integer number (749188440).

Almost surely, 2^158715777402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158715777402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239740300800).

158715777402 is an abundant number, since it is smaller than the sum of its proper divisors (320764824198).

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

158715777402 is a wasteful number, since it uses less digits than its factorization.

158715777402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 3841600, while the sum is 54.

The spelling of 158715777402 in words is "one hundred fifty-eight billion, seven hundred fifteen million, seven hundred seventy-seven thousand, four hundred two".