402521551542 has 192 divisors, whose sum is σ = 1065927133440. Its totient is φ = 108192153600.

The previous prime is 402521551507. The next prime is 402521551567. The reversal of 402521551542 is 245155125204.

402521551542 is a `hidden beast` number, since 4 + 0 + 2 + 52 + 1 + 551 + 54 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 402521551497 and 402521551506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12326817 + ... + 12359427.

It is an arithmetic number, because the mean of its divisors is an integer number (5551703820).

Almost surely, 2^402521551542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402521551542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532963566720).

402521551542 is an abundant number, since it is smaller than the sum of its proper divisors (663405581898).

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

402521551542 is a wasteful number, since it uses less digits than its factorization.

402521551542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32859 (or 32856 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 402521551542 its reverse (245155125204), we get a palindrome (647676676746).

The spelling of 402521551542 in words is "four hundred two billion, five hundred twenty-one million, five hundred fifty-one thousand, five hundred forty-two".