74470137840 has 240 divisors, whose sum is σ = 298251053568. Its totient is φ = 16281644544.

The previous prime is 74470137811. The next prime is 74470137877. The reversal of 74470137840 is 4873107447.

74470137840 is a `hidden beast` number, since 7 + 4 + 470 + 137 + 8 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 205294 + ... + 437133.

Almost surely, 2^74470137840 is an apocalyptic number.

74470137840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74470137840 is an abundant number, since it is smaller than the sum of its proper divisors (223780915728).

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

74470137840 is a wasteful number, since it uses less digits than its factorization.

74470137840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642476 (or 642467 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The spelling of 74470137840 in words is "seventy-four billion, four hundred seventy million, one hundred thirty-seven thousand, eight hundred forty".